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- Explain why the melting point of methyl fluoride, CH3F (-142°C), is higher than the melting point of methane, CH4 (-182°C)?
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- Rank the elements or compounds in the table below in decreasing order of their boiling points. That is, choose 1 next to the substance with the highest boiling point, choose 2 next to the substance with the next highest boiling point, and so on. chemical symbol, substance chemical formula boiling point or Lewis structure A CO |(Choose one) O2 |(Choose one) ♥ В H H .. Н — О — C H. |(Choose one) v C - | H H Al, O, |(Choose one) ? :0 :Explain why the melting point of methyl fluoride, CH3F (-142°C), is higher than the melting point of methane, CH4 (-182°C)?Consider the melting points of the substances below (see figures for two compounds). Explain the trend in melting point using your knowledge of intermolecular forces. (In the structures below, carbon is black, hydrogen is white, and oxygen is red.) Substance Melting Point (°C) Molar Mass (g/mol) Cl2 −102 71 Ethyl formate (CH3CH2OCHO) −80 74 Propionic acid (CH3CH2COOH) −20 74 Br2 −7.2 160
- Aspirin has a higher molar mass compared to salicylic acid, however aspirin melts at a lower temperature than salicylic acid. Provide a brief explanation for this observation. Table 1 Compound: Formula: Salicylic Acid C;H6O3 Aspirin C9H3O4 Molar Mass: 138.12 Melting point: Ka 158-160°C 1.08 x 10³ 180.15 140-142°C 2.72 x 10$ pKa Solubility (g/100ML) 2.99 4.57 0.18 0.25Rank the elements or compounds in the table below in decreasing order of their boiling points. That is, choose 1 next to the substance with the highest boiling point, choose 2 next to the substance with the next highest boiling point, and so on. chemical symbol, chemical formula or Lewis structure substance boiling point dh A NO (Choose one) 0 :0: H H C-C-– H (Choose one) 8 H. :0: H-C-N– H (Choose one) e N2 (Choose one) e D Check Explanation O 2022 McGraw ill LLC. All Rights Reserved. Terms of Use I Privacy Center / Accessibility MacBook Air %23 3 4. Y U I DWhich of these compounds has the highest melting point? O CI, O CF, O C. O CH, CBr.
- Choose the substance with the highest boiling point and explain why you choose it -NaCl -H2O -O3 -CH4Chemistry 1. Glycerol, CH2(OH)CH(OH)CH2OH, has a 3 carbon chain with -OH groups coming off of each carbon. This thick, syrup like liquid is used in anti-freeze and as a food additive. Hexaoctane, C18H38, is a greasy wax-like solid at room temperature. Using this information rank molecules in order of increasing boiling point and justify your answer: PCl2F, H2O, SeS3, MgS, Glycerol, CH4, CaS, PF2Cl, Hexaoctane, NeWhat is the angle between the carbon-oxygen bonds in the carbon dioxide (CO₂) molecule? 道。 X
- Methylamine has a vapor pressure of 344 torr at -25 °C and a boiling point of -6.4 °C. Find ΔHvap for methylamine.Which of the following compounds has the highest melting point? Carbon dioxide, CO2 H2S Benzene, C6H6 H2O Sucrose, C12H22O11Which of the following substances possess an internal structure of its constituent molecules that contain almost no empty space but allow freedom of movement? O Liquid alcohol (CH;CH2OH) O Vaporized alcohol (CH;CH2OH) O Carbon dioxide gas Solid carbon dioxide (as dry ice)
